[PATCH] D134377: [SLP]Try to emit canonical shuffle with undef operand.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, vdmitrie, spatel.
Herald added subscribers: vporpo, hiraditya.
Herald added a project: All.
ABataev requested review of this revision.
Herald added a subscriber: pcwang-thead.
Herald added a project: LLVM.

In the canonical form of the shuffle the poison/undef operand is the
second operand, the patch tries to emit canonical form for partial
vectorization of the buildvector sequence.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134377

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/PR35865-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/PR35865.ll
  llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll

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